package mcom.cmutweet;

import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyStore;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.protocol.HTTP;

/**
 * HTTPS client (accept all verifier)
 * @author bliu1
 *
 */
public class HttpsConn {
	public static HttpResponse httpsPost(String siteUrl, ArrayList<NameValuePair> nvps) throws Exception{
		HttpClient httpClient = getHttpsClient();
		HttpPost httpPost = new HttpPost(siteUrl);
		httpPost.setEntity(new UrlEncodedFormEntity(nvps));
		return httpClient.execute(httpPost);
	}
	
	static HttpClient getHttpsClient() throws Exception{
		KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
        trustStore.load(null, null);

        SSLSocketFactory sf = new MySSLSocketFactory(trustStore);
        sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

        HttpParams params = new BasicHttpParams();
        HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
        HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);

        SchemeRegistry registry = new SchemeRegistry();
        registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
        registry.register(new Scheme("https", sf, 443));

        ClientConnectionManager ccm = new ThreadSafeClientConnManager(params, registry);

        return new DefaultHttpClient(ccm, params);
	}
	
	public static class MySSLSocketFactory extends SSLSocketFactory {
	    SSLContext sslContext = SSLContext.getInstance("TLS");

	    public MySSLSocketFactory(KeyStore truststore) throws Exception{
	        super(truststore);
	        TrustManager tm = new X509TrustManager() {
	            @Override
				public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {}
	            @Override
				public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {}
	            @Override
				public X509Certificate[] getAcceptedIssuers() {return null;}
	        };
	        sslContext.init(null, new TrustManager[] { tm }, null);
	    }

	    @Override
	    public Socket createSocket(Socket socket, String host, int port, boolean autoClose) throws IOException, UnknownHostException {
	        return sslContext.getSocketFactory().createSocket(socket, host, port, autoClose);
	    }

	    @Override
	    public Socket createSocket() throws IOException {
	        return sslContext.getSocketFactory().createSocket();
	    }
	}
}
